578  
CDUS41 KLWX 212125  
CLIIAD  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC  
425 PM EST WED NOV 21 2018  
 
   
...............................
 
 
   
..THE WASHINGTON DULLES DC CLIMATE SUMMARY FOR NOVEMBER 21 2018
 
 
VALID TODAY AS OF 0400 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD 1981 TO 2010  
CLIMATE RECORD PERIOD 1960 TO 2018  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
..............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 53 259 PM 76 2007 55 -2 60  
MINIMUM 26 431 AM 16 1969 34 -8 34  
AVERAGE 40 45 -5 47  
 
PRECIPITATION (IN)  
TODAY 0.00 0.83 2005 0.12 -0.12 0.00  
MONTH TO DATE 5.87 2.38 3.49 1.96  
SINCE SEP 1 15.91 9.55 6.36 6.86  
SINCE JAN 1 59.17 37.55 21.62 39.86  
 
SNOWFALL (IN)  
TODAY 0.0 0.2 1987 0.1 -0.1  
MONTH TO DATE 3.0 0.2 2.8  
SINCE JUL 1 3.0 0.2 2.8  
SNOW DEPTH 0  
 
DEGREE DAYS  
HEATING  
TODAY 25 20 5 18  
MONTH TO DATE 411 358 53 382  
SINCE SEP 1 707 712 -5 602  
SINCE JUL 1 707 714 -7 603  
 
COOLING  
TODAY 0 0 0 0  
MONTH TO DATE 0 0 0 1  
SINCE SEP 1 338 160 178 220  
SINCE JAN 1 1522 1176 346 1281    
..............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NW (320)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION NW (320)  
AVERAGE WIND SPEED 5.0  
 
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 92 300 AM  
LOWEST 35 200 PM  
AVERAGE 64  
   
......................................................
 
 
 
THE WASHINGTON DULLES DC CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 55 75 2007  
MINIMUM TEMPERATURE (F) 34 14 2014  
1964  
 
 
SUNRISE AND SUNSET  
NOVEMBER 21 2018......SUNRISE 659 AM EST SUNSET 452 PM EST  
NOVEMBER 22 2018......SUNRISE 700 AM EST SUNSET 451 PM EST  
 
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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